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9 Threads found on edaboard.com: Vitdec And Matlab
I am writing a matlab code about convolutional encoder. I have created trellis for 4,8,16 and 32 states and their corresponding viterbi decoder(using vitdec matlab function). My system goes like this: Trellis Encoder-->DPSK Modulator-->Rayleigh fading Channel + awgn Noise-->DPSK Demodulator-->Viterbi (...)
I am writing a matlab code about convolutional encoder. I have created trellis for 4,8,16 and 32 states and their corresponding viterbi decoder(using vitdec matlab function). My system goes like this: Trellis Encoder-->DPSK Modulator-->Rayleigh fading Channel + awgn Noise-->DPSK Demodulator-->Viterbi (...)
I wrote a code but i have a problem to the end... After this b3=pskdemod(b2,2) I have a matrix with 0 1 for example b3 = Columns 1 through 21 1 0 1 1 0 1 0 etc But when i try the command b5=vitdec(b3,t,tb,'cont','hard') There is the following message ?
if your looking towards using matlab, then if you have the communication toolbox there is a function called vitdec, which will decode it. Which QAM are you talking about 8,16... The ML decoder uses a sliding window and gives the most reliable output. If you look at the communication toolbox most of what you have mentioned already exists. (...)
hello frnds!! can anyone help me on how to implement conv encoder and viterbi dec with rate=3/4 or 5/6 on matlab can you send me any link or any site about that one. i want matlab source code to know how to choose parameters of vitdec and convenc functions (constraint length and (...)
Hi I am doing a turbo codec using matlab. I finished the encoding part and stuck up with the decoder. I tried using 'vitdec' a ready function available in matlab, but i cannot get soft outputs so that i can pass that info to the second decoder and begin the iteration process
peace upon you my grdution project is in fixed wimax and i use vetrbi decoding in my implementation but when i use the vitdec function on matlab i found variable called traceback depth and i found that it is equal to 5 times the constrain length for rate 1/2. but i couldn't find the value of this variable for other rates (...)
I know there are convolution encoder/decoder functions in matlab. Look at conv for encoding and vitdec for decoding. I'm not sure if there are any other types of encoders or not.
Hi why you don't use matlab help. type convolutional in search field and then you find the topics. trellis,vitdec,poly2trellis,convenc ... are some of related commands in matlab. using these command is much easier faster and confident be successful VIVA PERSIA